人教版小学一年级数学口算题目100试题全套

15-8 =90 + 2 =9 =11 — 5 =70 + 3 =5 + 30 =14 — 9 =5 =80 + 4 =7 =3 + 30 =14 — 7 =51 — 1 =17 — 8 =88-8